JPS6257360B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a washing machine that automatically stops operating by measuring the cleanliness of washing water or rinsing water.

As a means of measuring the cleanliness of rinse water, etc.
There are devices that detect the transmittance of light, or devices that measure the value of the current flowing between a pair of electrodes installed in the aquarium, but conventionally, this detection means was installed at the water inlet and drain outlet, and electrically connected to the bridge. Assemble the circuit,
A technology was proposed that would stop operation when the difference in measured values reached a certain value.

However, such a technique can only be used when performing overflow rinsing, and cannot be used during washing or when performing pool rinsing.

The present invention detects the cleanliness of water in both the washing process and the rinsing process and automatically controls the operation. , has an outer tank and an inner tank 5 in a machine frame 3 having a lid 2 at the top opening. The outer tank is
A drain pipe 7 having a solenoid valve 6 is connected to the bottom, an overflow pipe 8 is connected to the upper part of the side wall, and a water cleanliness measuring device 9 consisting of a pair of electrodes is provided at the lower part of the side wall. A motor 10 is vertically installed at the center of the bottom. On the other hand, the inner tank 5 has a large number of dewatering holes 11 on the side wall, and the motor 10 at the bottom.
A pulsator 12 is provided which is driven by. Reference numeral 13 denotes a control box, which is equipped with a microprocessor, a water supply solenoid valve 14, etc. when the solenoid valve opens, from the water supply pipe 15 opened between the outer tank 4 and the inner tank 5. We ensure that water is supplied.

FIG. 2 is a block diagram showing the signal transmission relationship between the microprocessor installed in the control box 13 and various external devices.
indicates the flow of data, and → indicates the flow of control signals. Here, reference numeral 16 denotes a control unit mainly composed of an address register and a read-only memory (ROM), in which the contents of the washing process are stored in advance and are read out when necessary. - Generates various control signals such as gate on/off signals and timing signals. A memory group 17 is composed of a data write memory (RAM), and the storage contents of the control section 16 are transferred to this memory group as necessary. 18 is an arithmetic register, 19 is an arithmetic register group including an accumulator, and 20 is an arithmetic unit, which stores the contents of the memory group 17 in the arithmetic register 1.
8 and arithmetic register group 19, and the arithmetic unit 20
Arithmetic and logical operations are performed in . 21, 22...
Reference numerals 26 indicate interfaces, which are used to pass information under the control of the control section 16. A keyboard 27 is attached to the front of the control box 13 and has various operation keys. Reference numerals 28, 29, and 30 are power supply control units, which have built-in non-contact switches such as triacs, and are connected to the interfaces 22, 2.
When a signal is received from 3, 24, the non-contact switch is turned on, and the drain solenoid valve 6 and the water supply solenoid valve 14,
Alternatively, the motor 10 is energized.

Next, its operation will be explained. When the start key 31 in the keyboard 27 is pressed, the key signal is encoded by the interface 21 and sent to the calculation register group 1.
Transferred to 9. The control unit 16 determines this signal using the calculation unit 20 and starts washing.

That is, when the start key 31 is pressed, the control unit 1
6 determines this and outputs a water supply signal, which conducts the non-contact switch in the power supply control unit 29 via the interface 23, energizes the water supply solenoid valve 14 to open it, and the water supply port 15 Supply water.
When the water levels in the outer tank 4 and inner tank 5 reach predetermined values, water supply is stopped and the washing operation begins.

When starting the washing operation, first the ONS of memory group 17
The numbers "15" and "4" are encoded and stored in the street address and OFFS address, respectively. Next, motor 10
Rotate to the right for 15 seconds, then pause for 4 seconds, rotate to the left for another 15 seconds, and repeat. The 15 second count is done as follows. That is, set "1" in the calculation register 18, and write "60"("50" in the 50Hz area) in the _T1 address and _T2 address of the memory group 17, respectively.
is stored, and each time a commercial power frequency signal arrives via the interface 26, the contents of address _T1 are transferred to the arithmetic register group 19, subtraction is repeated in the arithmetic section 20, and the contents are transferred to the arithmetic register group 19. One second has passed when the content becomes "0". When the content of the arithmetic register group 19 is determined to be "0", the content "15" is transferred from the CNS address of the memory group 17 to the arithmetic register group 19;
The arithmetic unit 20 subtracts "1" and returns the result "14" to the ONS address. At the same time, the contents of address _T1 , which was set to "0" by the above calculation, are changed to "60", and the calculation is repeated. When the contents of the ONS address of the memory group become "0" by repeating the operation in this way,
Since 15 seconds have passed, the operation of the motor 10 is stopped. This stop time is 4 seconds. The counting of 4 seconds is also the same as above. After the 4-second stop time has elapsed, the motor 10 rotates again, but since the two non-contact switches in the power supply control section 30 are alternately conductive, the motor 10 alternately rotates clockwise and counterclockwise.

On the other hand, when the washing operation starts, a voltage is applied to the water cleanliness measurement device 9 consisting of a pair of electrodes, and the magnitude of the current flowing there is encoded in the interface 25 and transferred to the memory group 17, and the In the memory group, the signal is stored in the CL address every minute. Note that the magnitude of the current flowing through the cleanliness measuring device indicates the reciprocal of the cleanliness of the water in the outer tank 4. The memory group 17 rewrites and stores the signal indicating the cleanliness every minute, but at the same time, the contents stored one minute ago and the newly stored contents are stored in the calculation register 18 and the calculation register group, respectively. 1
9, and the arithmetic unit 20 performs subtraction. The washing operation ends when the control section determines that the subtraction result is less than or equal to a predetermined value.

In the case of washing operation, the change in conductivity of washing water is the third
It will look like the figure. Fresh water has low conductivity, but
If you add detergent, it will be expensive. When the pulsator is rotated to start washing, dirt comes out from the clothes and the conductivity increases further, but as the washing progresses, it becomes saturated. When the conductivity of the water is saturated, it means that most of the dirt from the clothes has gone into the water, making the water less clean. Therefore, as mentioned above, if the difference in cleanliness is periodically subtracted and the difference becomes less than a predetermined value, it means that the saturation state has been approached, and most of the dirt has come out from the clothes. You can finish washing here.

After the washing operation is completed, drain the water and move on to the rinsing operation. In the case of overflow rinsing, the conductivity of water changes as shown in Figure 4 A and approaches a constant value, so as in the case of washing operation, the magnitude of the current flowing between the pair of electrodes is periodically adjusted. The rinsing operation may be completed when the difference between the measured value and the previous measured value is calculated, and the difference becomes less than a certain value.

In the case of reservoir rinsing, the conductivity of the water changes as shown in FIG. However, in the case of reservoir rinsing, after the first rinse is completed, the water is drained, and the second and subsequent rinses are repeated. When the control unit 16 determines that the cleanliness of the rinsing water has reached a predetermined value or higher, all rinsing operations are terminated.

As described above, the present invention periodically measures the cleanliness of water during a washing operation or a rinsing operation, subtracts it from the previous measurement value, and when the result falls below a certain value, the washing operation or rinsing operation is performed. Since the rinsing operation is set to end, the machine will run for the optimal amount of time depending on the amount of laundry and the degree of dirt, making it the perfect fully automatic washing machine as there is no excess or deficiency in washing or rinsing time. be.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal side view of the washing machine of the present invention, Fig. 2 is a block diagram showing the data transmission relationship between the inside of the microprocessor and external equipment, and Fig. 3 is a diagram showing changes in the conductivity of washing water. , FIGS. 4A and 4B are diagrams showing changes in the conductivity of rinse water during overflow rinsing and reservoir rinsing, respectively. 4...Outer tank, 9...Cleanliness measuring device, 17...Memory group, 20...Calculation section.

Claims (1)

[Claims] 1. Periodically measures the conductivity of water in the tub of a washing machine, stores it in a memory group, and calculates the difference between the latest stored value and the previous stored value. and, if the result is less than a predetermined value, the washing or rinsing operation is terminated. 2 In the case of reservoir rinsing, when the calculation result becomes less than a predetermined value, the rinsing operation is ended, the water is drained, water is supplied again and the next rinsing operation is performed, and the water measured after the predetermined time after the start of the operation is Claim 1: When the conductivity is above a predetermined value, all rinsing is completed and the dehydration operation is started.
Laundry equipment as described in section.